1 files changed, 42 insertions, 0 deletions
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/content/ReservedDocumentTypeNameValidator.java b/config-model/src/main/java/com/yahoo/vespa/model/content/ReservedDocumentTypeNameValidator.java
new file mode 100644
index 00000000000..9f081f7083b
--- /dev/null
+++ b/config-model/src/main/java/com/yahoo/vespa/model/content/ReservedDocumentTypeNameValidator.java
@@ -0,0 +1,42 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.model.content;
+
+import com.yahoo.documentmodel.NewDocumentType;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ReservedDocumentTypeNameValidator {
+
+    public static final List<String> ORDERED_RESERVED_NAMES = Collections.unmodifiableList(
+            Arrays.asList("and", "false", "id", "not", "null", "or", "true"));
+    public static final Set<String> RESERVED_NAMES = Collections.unmodifiableSet(new HashSet<>(ORDERED_RESERVED_NAMES));
+
+    public void validate(Map<String, NewDocumentType> documentDefinitions) {
+        List<String> conflictingNames = documentDefinitions.keySet().stream()
+                .filter(this::isReservedName)
+                .collect(Collectors.toList());
+        if (!conflictingNames.isEmpty()) {
+            throw new IllegalArgumentException(makeReservedNameMessage(conflictingNames));
+        }
+    }
+
+    private boolean isReservedName(String name) {
+        return RESERVED_NAMES.contains(name.toLowerCase());
+    }
+
+    private static String asQuotedListString(List<String> list) {
+        return list.stream().map(s -> String.format("'%s'", s)).collect(Collectors.joining(", "));
+    }
+
+    private static String makeReservedNameMessage(List<String> conflictingNames) {
+        return String.format("The following document types conflict with reserved keyword names: %s. Reserved keywords are %s",
+                asQuotedListString(conflictingNames), asQuotedListString(ORDERED_RESERVED_NAMES));
+    }
+
+}